Flame retardant electrical wire

a technology of electrical wires and flame retardants, applied in the direction of insulated conductors, plastic/resin/waxes insulators, insulated cables, etc., can solve the problems of failure prematurely, failure to sustain success, cracking of insulation layers in thermoplastic polyester insulated electrical wires, etc., and achieve the effect of large surface area

Inactive Publication Date: 2006-06-22
SABIC INNOVATIVE PLASTICS IP BV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0009] In addition, flame retardance becomes increasingly difficult as the insulation wall thickness d

Problems solved by technology

Thermoplastic polyester insulation layers have outstanding resistance to gas and oil, are mechanically tough and resistant copper catalyzed degradation but can fail prematurely due to hydrolysis.
The insulation layers in thermoplastic polyester insulated electrical wires have also been found to crack when exposed to hot salty water and have failed when subjected to humidity temperature cycling.
Cross linked polyethylene has largely been successful in providing high temperature insulation but this success may be difficult to sustain as the requirements for automotive electrical wire evolve.
The reductions in insulation wall thickness pose difficulties when using crosslinked polyethylene.
For crosslinked polyethylene the thinner insulation layer thickness result in shorter thermal life, when aged at oven temperatures between 150° C. and 180° C. This limits their thermal rating.
But with a similar electrical wire having a crosslinked p

Method used

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  • Flame retardant electrical wire
  • Flame retardant electrical wire
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Examples

Experimental program
Comparison scheme
Effect test

examples

[0098] The following examples were prepared using the materials listed in Table 1.

TABLE 1ComponentDescriptionPPEA poly(2,6-dimethylphenylene ether) with an intrinsic viscosity of0.46 dl / g as measured in chloroform at 25° C. commerciallyavailable from General Electric under the grade name PPO646.KG1650A polyphenylethylene-poly(ethylene / butylene)-polyphenylethyleneblock copolymer having a phenylethylene content of 30 weightpercent, based on the total weight of the block copolymer andcommercially available from KRATON Polymers under the grade nameG 1650.PPA polypropylene having a melt flow rate of 1.5 g / 10 mindetermined according to ASTM D1238 as described above andcommercially available under the tradename D-105-C SunocoChemicals.Tuftec H1043A polyphenylethylene-poly(ethylene / butylene)-polyphenylethyleneblock copolymer having a phenylethylene content of 67 weightpercent, based on the total weight of the block copolymer andcommercially available from Asahi Chemical.KG1657A mixture of...

examples 1-18

[0099] Examples 1-19 were made by combining the components in a twin screw extruder. The PPE and block copolymers were added at the feedthroat and the PP was added downstream. The organophosphate ester was added by a liquid injector in the second half of the extruder. The material was pelletized at the end of the extruder and the pelletized material was injected molded into test specimens for flexural modulus, heat deflection temperature, and melt flow rate testing.

[0100] Flexural modulus (FM) was determined using ASTM D790-03 at a speed of 1.27 millimeters per minute and is expressed in kilograms per square centimeter (kg / cm2). The values given are the average of three samples. The samples for flexural modulus were formed using an injection pressure of 600-700 kilograms-force per square centimeter and a hold time of 15 to 20 seconds on a Plastar Ti-80G2 from Toyo Machinery & Metal co. LTD. The remaining molding conditions are shown in Table 2.

[0101] Heat distortion temperature (H...

examples 19-26

[0107] Examples 19-26 were made and tested as described above with regard to Examples 1-18. Compositions and results are shown in Table 4.

TABLE 419*20*212223*24*2526*PPE51.449.247.141.853.952.350.646.5PP2727272727272727KG 1650101010101010101071B (A)11.613.815.921.2————RDP (A)————9.110.712.416.5FM1609816658167011376416136163731657315438HDT1201109972127128120103MFR22.1530.641.058.2517.116.3521.0534.9Weighted average3030303030303030aryl alkylene content(B)Phosphorous content0.991.171.351.800.991.171.351.80(C)(A) + (B)41.643.845.951.239.140.742.446.5(B) + (C)30.9931.1731.3531.8030.9931.1731.3531.80Average flame out61.0121.614.22.3115.2114.27.92.3timeFlame out time >70 secYYNNYYNN

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Abstract

An electrical wire comprising conductor and a covering disposed over the conductor. The covering comprises a thermoplastic composition. The thermoplastic composition comprises a poly(arylene ether); a polypropylene, a block copolymer; and an organophosphate ester. The sum of weighted average aryl alkylene content of the block copolymer and the amount of organophosphate ester is greater than or equal to 46.5.

Description

CROSS REFERENCE TO RELATED APPLICATIONS [0001] This application claims priority to U.S. Provisional Application Ser. No. 60 / 637,406, filed on Dec. 17, 2004, which is incorporated in its entirety by reference herein.BACKGROUND OF INVENTION [0002] Automotive electrical wire located under the hood in the engine compartment has traditionally been insulated with a single layer of high temperature insulation that is disposed over an uncoated copper conductor. Thermoplastic polyesters, cross linked polyethylene and halogenated resins such as fluoropolymers, polyvinyl chloride have long filled the need for the high temperature insulation needed in this challenging environment that requires not only heat resistance, chemical resistance, flame retardance, and flexibility. [0003] Thermoplastic polyester insulation layers have outstanding resistance to gas and oil, are mechanically tough and resistant copper catalyzed degradation but can fail prematurely due to hydrolysis. The insulation layers...

Claims

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Application Information

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IPC IPC(8): D02G3/00C08K5/52
CPCH01B3/427Y10T428/2933H01B3/441H01B3/30H01B7/02
Inventor KUBO, HIROSHIMHETAR, VIJAY R.RAJAMANI, VIJAYSATO, SHOTAI, XIANGYANGYAO, WEIGUANG
Owner SABIC INNOVATIVE PLASTICS IP BV
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